Dynocom results for my C5 daily driver
#1
Dynocom results for my C5 daily driver
Several weeks ago I finally got my tune about where I was comfortable enough to put the car on a dyno. I took advantage of a "Dyno Day" at Henson Performance in Birmingham, AL to make a few pulls. I was suprised at the 471whp / 470 tq and chalked it up to a "happy dyno". Today I stopped by another local dyno to make some back-up runs just to see how far off the first test was. After a small fuel adjustment I had a 467whp / 461 tq (SAE correction of 5%) printout, pretty much identical between the dynos. I believe both of the dynos are Dynocom, with the one today being a 3,200lb roller with eddy brake.
I understand the concept of simply using a dyno as a testing tool, and not to get too concerned with the numbers, but I would like to just hear some comments about how Dynocom numbers compare to other well known dynos.
My car is a '99 FRC with stock LS1 shortblock, AFR205 heads, YT rockers, Comp 224°/230° XFI lobe on 111°, headers with Ti exhast, U/D pulley, FAST 78mm & stock TB ported by me, 30# injectors, Textralia clutch, stock driveline. HP Tuned by me.
I have a couple 1/8 mile passes with 94.2 mph but poor 1.9 sixty foot and sorry 7.70 ET.
So, what's the consensus: Just use the test as a tool to tweak my street tune or are these results in line with other dynos.
I understand the concept of simply using a dyno as a testing tool, and not to get too concerned with the numbers, but I would like to just hear some comments about how Dynocom numbers compare to other well known dynos.
My car is a '99 FRC with stock LS1 shortblock, AFR205 heads, YT rockers, Comp 224°/230° XFI lobe on 111°, headers with Ti exhast, U/D pulley, FAST 78mm & stock TB ported by me, 30# injectors, Textralia clutch, stock driveline. HP Tuned by me.
I have a couple 1/8 mile passes with 94.2 mph but poor 1.9 sixty foot and sorry 7.70 ET.
So, what's the consensus: Just use the test as a tool to tweak my street tune or are these results in line with other dynos.
#4
Yeah - the torque numbers are too high for a naturally aspirated 346" LS1.
I calculated my static compression a little over 11:1 (using 59cc chambers) and my dynamic compression was around 8.8:1. I can get by with 27° of timing at WOT on 93 octane, but I start to pick up a little knock above 28°. I might also add that this stock short block has 179,000 miles on it too. It should be broken in by now.
I calculated my static compression a little over 11:1 (using 59cc chambers) and my dynamic compression was around 8.8:1. I can get by with 27° of timing at WOT on 93 octane, but I start to pick up a little knock above 28°. I might also add that this stock short block has 179,000 miles on it too. It should be broken in by now.
#7
Yes they are - you did me right on that sale last year.
I bought this car 2½ years ago bone stock with 115k miles. It got headers within the first 10k miles, the first cam at 128k, and the AFR heads and current cam at ~ 155k. After a couple clutch smoking launches last fall, I put a Textralia clutch in it in Feb, and then broke the output shaft in April at the dragstrip. Although I upgraded to a hardened shaft, I haven't tried to launch it with sticky tires again. Maybe, just maybe I'll have to borrow some tires to see if I can get a decent 60' and ET out of it. Meanwhile I just continue to drive it 500+ miles a week back and forth to work.
I am still just a little skeptical about the dyno numbers though. I may try a Dynojet just as a comparison.
I bought this car 2½ years ago bone stock with 115k miles. It got headers within the first 10k miles, the first cam at 128k, and the AFR heads and current cam at ~ 155k. After a couple clutch smoking launches last fall, I put a Textralia clutch in it in Feb, and then broke the output shaft in April at the dragstrip. Although I upgraded to a hardened shaft, I haven't tried to launch it with sticky tires again. Maybe, just maybe I'll have to borrow some tires to see if I can get a decent 60' and ET out of it. Meanwhile I just continue to drive it 500+ miles a week back and forth to work.
I am still just a little skeptical about the dyno numbers though. I may try a Dynojet just as a comparison.
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#12
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Yes they are - you did me right on that sale last year.
I bought this car 2½ years ago bone stock with 115k miles. It got headers within the first 10k miles, the first cam at 128k, and the AFR heads and current cam at ~ 155k. After a couple clutch smoking launches last fall, I put a Textralia clutch in it in Feb, and then broke the output shaft in April at the dragstrip. Although I upgraded to a hardened shaft, I haven't tried to launch it with sticky tires again. Maybe, just maybe I'll have to borrow some tires to see if I can get a decent 60' and ET out of it. Meanwhile I just continue to drive it 500+ miles a week back and forth to work.
I am still just a little skeptical about the dyno numbers though. I may try a Dynojet just as a comparison.
I bought this car 2½ years ago bone stock with 115k miles. It got headers within the first 10k miles, the first cam at 128k, and the AFR heads and current cam at ~ 155k. After a couple clutch smoking launches last fall, I put a Textralia clutch in it in Feb, and then broke the output shaft in April at the dragstrip. Although I upgraded to a hardened shaft, I haven't tried to launch it with sticky tires again. Maybe, just maybe I'll have to borrow some tires to see if I can get a decent 60' and ET out of it. Meanwhile I just continue to drive it 500+ miles a week back and forth to work.
I am still just a little skeptical about the dyno numbers though. I may try a Dynojet just as a comparison.
Wow that would make me go insane driving that much for work. Why do you have to drive so far to work?
#16
I was about to ask which car you have and then I noticed your sig. I love your Sonoma build. Very nicely done, great stance and sounds wicked.
The turbo 408 build for my Nova is going to be a long range project. I have picked up the rotating assembly, and am about ready to cart the block off to the machine shop. But every time I start adding up parts remaining to buy, I get a little depressed. All in good time I guess. Hanging around a bunch of forced induction guys at Lane's dyno Saturday got me pumped up to get my build moving along.
The turbo 408 build for my Nova is going to be a long range project. I have picked up the rotating assembly, and am about ready to cart the block off to the machine shop. But every time I start adding up parts remaining to buy, I get a little depressed. All in good time I guess. Hanging around a bunch of forced induction guys at Lane's dyno Saturday got me pumped up to get my build moving along.
#18
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I was about to ask which car you have and then I noticed your sig. I love your Sonoma build. Very nicely done, great stance and sounds wicked.
The turbo 408 build for my Nova is going to be a long range project. I have picked up the rotating assembly, and am about ready to cart the block off to the machine shop. But every time I start adding up parts remaining to buy, I get a little depressed. All in good time I guess. Hanging around a bunch of forced induction guys at Lane's dyno Saturday got me pumped up to get my build moving along.
The turbo 408 build for my Nova is going to be a long range project. I have picked up the rotating assembly, and am about ready to cart the block off to the machine shop. But every time I start adding up parts remaining to buy, I get a little depressed. All in good time I guess. Hanging around a bunch of forced induction guys at Lane's dyno Saturday got me pumped up to get my build moving along.
#19
I bought my '99 FRC off Ebay back in March 2007. I paid $15,500 for it with 115k miles. I have seen better sounding deals since then, but from January 07 to March 07 that was the best I could find.
I have a Nova 408 build thread on the HSVracing forum, but I thought I would wait a little to get more progress before submitting myself to the scrutiny of this forum. It's a tough crowd here on LS1tech.com. I am still undecided on heads. Of course budget is holding me back from snatching some new off the shelf. If I can find a deal on some gently used aftermarket heads I would love to go that route. Otherwise I will have my 317s CNC ported and cut for 2.08"/1.60" valves.
I have a Nova 408 build thread on the HSVracing forum, but I thought I would wait a little to get more progress before submitting myself to the scrutiny of this forum. It's a tough crowd here on LS1tech.com. I am still undecided on heads. Of course budget is holding me back from snatching some new off the shelf. If I can find a deal on some gently used aftermarket heads I would love to go that route. Otherwise I will have my 317s CNC ported and cut for 2.08"/1.60" valves.